| A | B |
|---|
| biotic | living parts of an ecosystem |
| abiotic | nonliving parts of an ecosystem |
| symbiosis | relationship between different kinds of organisms |
| community | all the populations of species that live and interact in an ecosystem |
| commensalism | one organism benefits and another is not affected |
| population | group of organisms of the same species living in the same area |
| mutualism | relationship where both organisms benefit |
| prey | animals that are hunted and eaten |
| parasitism | one organism benefits and another is harmed |
| extinction | death of all the organisms of a species |
| climax community | stable ecosystem |
| pioneer species | first organisms to live in an area |
| primary succession | first community to grow in an area |
| succession | replacement of one type of community by another over time |
| secondary succession | community growing in an area affected by a disturbance |
| conservation | saving of resources |
| reclamation | damaged ecosystems that are cleaned and restored |
| pollution | waste products that damage ecosystems |
